Herbert brooks



H. BROOKS.

. APPLICATION FILED NOV. 22,1918.

Patented Dec. 7, 1920 MEANS FOR comaoume THE SUPPLY OF uoum FUEL T0INTERNAL COMBUSTION ENGINES.

. UNITED. STATES PATENT OFFICE.

HERBERT BROOKS, 0F YEOVIL, ENGLAND, ASSIGNOR TO PETTERS LIMITED, 0!YEO'Vm ENGLAND.

MEANS FOR CONTROLLING THE SUPPLY OF LIQUID FUEL TO INTERNAL-COMBUSTIONENGINES.

Specification of Letters Patent.

Patented Dec. 7, 1920.

Application filed November 22, 1918. Serial No. 283,748.

7 0 all whom it may concern Be it known that I, HERBERT Bnoons, oflVhitleigh, St. Michaels Avenue, Yeovil, in the county of SomersetEngland, subject of the King of Great Britain and Ireland, have inventedcertain new and useful Improvements in Means for Controlling the Supplyof Liquid Fuel to Internal-Combustion Engines, of which the following isa specification.

This invention relates to internal combustion engines using two kinds offuel oil either alternatively or simultaneously, one being highlyinflammable and the other less inflammable.

The object of this invention is to provide an improved means fordelivering and controlling the supply.

In my method of arriving at the desired result I provide a fuel pump ofthe plunger type to which are fitted two independent suction valves,whereby the fuel is admitted to the pump from different sources. Betweenthe suction valves and the fuel supply tanks I arrange suitableregulating valves so that the proportion of the fuels can be varied asdesired.

Thus on the outward stroke of the fuel pump plunger, the highlyinflammable oil is admitted into the said pump through one of thesuction valves and the less inflammable oil through the other suctionvalve, the proportion of the two fuels admitted being controlled asdesired by the regulating valves. The mixed charge taken in by the pumpis then delivered to the injection nozzle through a common deliverypipe. By this means I am enabled to grade the quality of the fuel oildelivered to the engine. If it is not sufficiently inflammable I may addto it a small proportion of a more inflammable oil so as to causecomplete combustion. If on the other hand it is highly inflammablecausing the combustion temperature to be too high, I may add to it asmall proportion of a less inflammable oil.

A further advantage resulting from the reduction of the combustiontemperature is that preignition is avoided and the power of the enginethereby increased.

In the accompanying drawing is shown a fuel pump fitted with my devicetogether with the regulating valves t whereby the two kinds or either ofthe fuels can be taken in 011 the suction stroke of the pump. By

closing one of the regulating valves the pump takes fuel from one sourceonly through the suction valve which retains its free passage. Byopening both the regulatmg valves the pump takes its supply from twosources, the proportion of each kind of fuel being controlled by theamount of openmg glven to the regulating valves.

a is a pump mounted on a casting b, the pump being provided with aspring pressed plunger 0. On the plunger is a collar d and between thecollar 03 and the pump is a spring eadapted to withdraw the plunger fromthe pump. On the casting b is pivoted a lever 7 adapted to bear on thecollar (l. The lever is provided with a handle 9 adapted to bear againsta stop h. On the casting b is a gudgeon pin j, on which is mounted arocking lever 70 carrying a roller m, adapted to strike the plunger 0. ss are the suction pipes leading from the sources of supply. 0 isthedelivery pipe leading to the injection nozzle. The purpose of the'handleg is to put the pump out of action by moving the plunger 0 away from theroller m.

The rocking lever 70 is adapted to be reciprocated by a connecting rod1'. In operation on the reciprocation of the eccentric rod 1" the lever70 strikes the plunger 0, causing the pump to deliver fuel into thecombustion chamber through the nozzle 19. After the injection stroke thepump plunger is returned to its original position by the spring 6,whereby fuel is admitted to the pump from either or both sources ofsupply ready for the next injection stroke. The two fuels can enter thefuel pump box through one inlet w or separate inlets may be provided,say one at the bottom for one kind of fuel, and another at the side orend for the other fuel. By keeping one inlet a little higher than theother it is possible to arrange for one kind of oil to go to the nozzlein advance of the other kind; but in all cases the fuel is delivered tothe engine by the pipe 0 to the nozzle 7).

What I claim as my invention and desire to secure by Letters Patentis 1. In combination with an internal combustion engine utilizing twodifferent kinds of liquid fuel, means for delivering and controlling amixture of said liquid fuels to the engine cylinder comprising incombination a liquid fuel plunger pump, a liquid fuel injection devicefor the engine cylinder, a discharge duct from the pump to saidinjection device, two independent suction pipes connected to the pumpcasing, one for each kind of liquid fuel for feeding the fuels for saidmixture to said pump, and a manually controlled valve in each suctionpipe for varying'the proportions of the two different kinds of liquidfuel concomitantly admitted to the pump, and thereby comprising meansfor regulating the mixture.

2. In combination with an internal combustion engine, means fordelivering and controlling the supply thereto of two different kinds ofliquid fuel, comprising a fuel injection pump fitted with twoindependent suction valves, so that on the suction stroke of the pump,one valve admits the less inflammable fuel and the other valve the morehighly inflammable fuel into the said pump, a common discharge pipeleading from the )ump to the injection nozzle of the engine cylinder,and means for varying at will the proportion of the two different kindsof fuel admitted to the pump through the respective suction valves.

In witness whereof, I have hereunto signed my name.

HERBERT BROOKS.

